Polymers from Renewable Resources最新文献_第6页

Radiation induced biodegradable polymer blends for growth promotion of corn plants 辐射诱导的可生物降解聚合物共混物对玉米生长的促进作用

Polymers from Renewable Resources Pub Date : 2022-02-01 DOI: 10.1177/20412479221107486

Afaf A Abdel Hakiem, Yasser K. Abdel Moneam, H. M. Said, Magdy MH Senna

引用次数: 4

Miscibility effect of biodegradable aliphatic poly(butylene succinate)/aromatic polycarbonate blends 可生物降解脂肪族聚丁二酸丁二烯/芳香族聚碳酸酯共混物的混相效应

Polymers from Renewable Resources Pub Date : 2021-08-24 DOI: 10.1177/20412479221109912

T. Gumede, K. Shingange, P. Mbule, B. Motloung

{"title":"Miscibility effect of biodegradable aliphatic poly(butylene succinate)/aromatic polycarbonate blends","authors":"T. Gumede, K. Shingange, P. Mbule, B. Motloung","doi":"10.1177/20412479221109912","DOIUrl":"https://doi.org/10.1177/20412479221109912","url":null,"abstract":"Biodegradable polymers are gaining attention for applications in drug delivery, tissue engineering, and wound management. Methods for enhancing their potential in these applications include blending biodegradable aliphatic polyester with other biodegradable aliphatic polyester and/or blending aliphatic polyesters with aromatic polyesters to form blends with unique properties. Herein, we report on the effect of a non-biodegradable aromatic polycarbonate (PC) on the physical, mechanical, and thermal properties of biodegradable aliphatic polybutylene succinate (PBS). The PBS/PC blends contained 3, 13, and 27 wt% PC and were prepared by melt extrusion. The FTIR results revealed apparent compatibility between the two polymers. Even though the blends are compatible, the extent of miscibility depends on thermodynamics terms such as enthalpy, entropy, and Gibbs free energy. According to the SEM micrographs, adding 3 wt% PC resulted in a miscible polymer blend. Above this content, phase dispersion was observed. XRD results revealed peak shifts to higher angles and new peaks forming between 25 and 30°. This is related to the interaction between the components in the blends. The crystallinity was also improved at 3 wt% PC and this is consistent with the DSC results. TGA analysis indicated no improvement in the thermal stability of the blends. DMA revealed that at low PC content (3 wt%), there is a marked improvement in the elastic modulus. This study will benefit the field of Polymer Science because if one wants to prepare PBS/PC they will know that they perform optimally at low PC content.","PeriodicalId":20353,"journal":{"name":"Polymers from Renewable Resources","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45983862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Characterization of groundnut shell powder as a potential reinforcement for biocomposites 花生壳粉末作为生物复合材料潜在增强材料的表征

Polymers from Renewable Resources Pub Date : 2021-08-01 DOI: 10.1177/20412479211008761

M. Usman, I. Momohjimoh, A. Usman

{"title":"Characterization of groundnut shell powder as a potential reinforcement for biocomposites","authors":"M. Usman, I. Momohjimoh, A. Usman","doi":"10.1177/20412479211008761","DOIUrl":"https://doi.org/10.1177/20412479211008761","url":null,"abstract":"Natural fibers are becoming the right candidate material as a substitute for glass fibers in the reinforcement of plastic polymers for various applications. The ease of their processing with minimal energy consumption and the quest to produce biodegradable plastics with lightweight has given natural fibers comparative advantages over synthetic fibers. In this study, groundnut shell powder (GSP) in different forms (untreated, sodium hydroxide treated and ash) were characterized using X-ray diffraction (XRD), Fourier transform infrared (FTIR), X-ray fluorescence (XRF), Nuclear magnetic resonance (NMR), Differential scanning calorimetry (DSC) and Scanning electron microscopy (SEM) to evaluate their possible utilization as reinforcement in polymers. GSP was treated with sodium hydroxide for 5 hrs and dried in vacuum for 24 hrs to obtain treated GSP while ash GSP was formed by heating GSP in the furnace at 600 °C for about 3 hrs. The results reveal that sodium hydroxide treatment was very effective in the breaking down of the hydrogen bond with a consequent reduction in the hydrophilicity of the GSP. This would promote GSP bonding with the hydrophobic polymer matrix in the development of natural fiber reinforced plastic polymer composite materials. Ash GSP was found to have the highest crystallinity among the three forms of GSP based on XRD results. Therefore, the result achieved in this work confirmed that treated and ash GSP fibers are good reinforcement material in the production of polymer composites, with the actual choice depending on end-use property requirements of the composite.","PeriodicalId":20353,"journal":{"name":"Polymers from Renewable Resources","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45716950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Poultry feather disulphide bond breakdown to enable bio-based polymer production 家禽羽毛二硫键断裂，实现生物基聚合物生产

Polymers from Renewable Resources Pub Date : 2021-04-19 DOI: 10.1177/20412479211008746

T. McGauran, N. Dunne, B. Smyth, E. Cunningham, M. Harris

{"title":"Poultry feather disulphide bond breakdown to enable bio-based polymer production","authors":"T. McGauran, N. Dunne, B. Smyth, E. Cunningham, M. Harris","doi":"10.1177/20412479211008746","DOIUrl":"https://doi.org/10.1177/20412479211008746","url":null,"abstract":"With oil supplies, needed for plastic production, decreasing dramatically, there is a clear driver for alterative polymers from sustainable resources. Poultry feathers, containing ∼90% keratin, are one source of natural polymer with huge potential for biopolymer production. However, the presence of crosslinks, known as disulphide bonds, hinders processability. This paper reviews techniques to enable breakage of disulphide bonds through use of reduction agents (sodium sulphite and sodium sulphate) and hydrolysis. Samples were analysed using FTIR and DSC to quantify achievable bond breakage, effect on thermal properties and changes in protein concentration. A review on the effect of particle size on disulphide bond breakage was also conducted, along with quantifying the reformation of bonds post-processing. Finally, a bicinchoninic acid (BCA) protein assay was used to quantify changes to soluble protein content, key to predicting if biopolymer formation can occur. The results showed a final disulphide bond breakage of between 48% and 67% was achievable using these techniques. It was also shown that disulphide bond content exhibited up to 60% bond reformation post treatment. These reductions in disulphide bonds increased the thermoplastic nature and apparent protein content. Despite achieving the highest bond breakage percentage, hydrolysis caused degradation of useful proteins, rendering the material unsuitable for biopolymer production. Results suggested that treatment with sodium sulphite (4.3% wt. of feathers) and use of a small particle size (0–100 µm), sufficiently altered the properties of raw feathers to enable feather biopolymer production.","PeriodicalId":20353,"journal":{"name":"Polymers from Renewable Resources","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/20412479211008746","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49406752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Radiation modification and characterization of polyvinyl alcohol/starch/citric acid/glycerol bioblend film 聚乙烯醇/淀粉/柠檬酸/甘油生物共混膜的辐射改性及表征

Polymers from Renewable Resources Pub Date : 2021-03-17 DOI: 10.1177/20412479221122298

A. M. Abdel-Ghaffar, H. Ali

{"title":"Radiation modification and characterization of polyvinyl alcohol/starch/citric acid/glycerol bioblend film","authors":"A. M. Abdel-Ghaffar, H. Ali","doi":"10.1177/20412479221122298","DOIUrl":"https://doi.org/10.1177/20412479221122298","url":null,"abstract":"Blend films of polyvinyl alcohol (PVA) with starch (St) were obtained by casting method. The effect of different contents of glycerol (Glyc) and citric acid (CA) was investigated. The successful preparations of different compositions were shown by FTIR analysis. The bioblend film of PVA/St/CA/Glyc with a composition of (2:1:1/10 vol %) was selected due to its water resistance, higher mechanical properties, and good thermal stability than other prepared bioblend films. Further improvements were obtained by irradiation with gamma rays at a dose of 10 kGy, where the water resistance was highly reduced and the tensile strength strongly improved. The thermal stability increased with the increasing of irradiation doses up to 30 kGy. The modified thermal and mechanical properties of the selected film either non-irradiated or irradiated were compared with widely used commercially packaging films such as LDPE and PP films. Compared to commercially packaging films, the selected PVA/St bioblend film has higher tensile properties, good and closely thermal properties either non-irradiated or irradiated one. Hence, the study showed the development of modified PVA/St bioblend film, which can be used in many fields such as the packaging industry.","PeriodicalId":20353,"journal":{"name":"Polymers from Renewable Resources","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48626520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Chitosan-based films reinforced with cellulose nanofibrils isolated from Euterpe oleraceae MART 木犀草科纤维素纳米纤维增强壳聚糖基薄膜

Polymers from Renewable Resources Pub Date : 2021-02-01 DOI: 10.1177/20412479211008747

DG Braga, Pgf Bezerra, Abfd Lima, HA Pinheiro, LG Gomes, AS Fonseca, L. Bufalino

{"title":"Chitosan-based films reinforced with cellulose nanofibrils isolated from Euterpe oleraceae MART","authors":"DG Braga, Pgf Bezerra, Abfd Lima, HA Pinheiro, LG Gomes, AS Fonseca, L. Bufalino","doi":"10.1177/20412479211008747","DOIUrl":"https://doi.org/10.1177/20412479211008747","url":null,"abstract":"The use of local raw materials for the production of biodegradable films can simultaneously contribute to the development of the Amazon and global sustainability. This work aimed to evaluate the physical and mechanical performance of chitosan-based bionanocomposite films reinforced with different loads of cellulose nanofibrils obtained from açaí (Euterpe oleraceae Mart.) under two nanofibrillation degrees. Nanofibrils were obtained by 3 and 21 passages in a grinder defibrillator. The films were produced by casting with nanofibril reinforcement at 5 wt.%, 10 wt.%, 15 wt.%, and 20 wt.%. The increase in the nanofibril level and nanofibrillation degree reduced water vapor absorption (75.20% to 51.93%), water solubility (28.33% to 17.91%), and density (0.87 g.cm−3 to 0.61 g.cm−3). The water vapor permeability decreased with higher nanofibril loads for both 3-pass (47.30% to 43.61%) and 21-pass (49.82% to 44.48%) reinforced films, but not with nanofibrillation degree. The increase in 3-pass nanofibril level decreased tensile strength (8.18 MPa to 7.88 MPa), modulus of elasticity (867.62 MPa to 670.02 MPa) and elongation at break (0.02 mm.mm−1 to 0.01 mm.mm−1). However, the opposite effect happened to 21-pass nanofibrils, with increases from 9.16 MPa to 9.73 MPa and from 502.00 MPa to 1119.62 MPa for tensile strength and modulus of elasticity, respectively. Meanwhile, the maximum elongation at rupture did not vary. It was concluded that chitosan-based bionanocomposite films reinforced with 20 wt.% of 21-pass nanofibril were more resistant, except for water vapor permeability. Adding coarser nanofibrils enhanced this property. The 3-pass nanofibrils reinforcement enables water solubility, which benefits other packaging applications.","PeriodicalId":20353,"journal":{"name":"Polymers from Renewable Resources","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/20412479211008747","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45212516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Perspectives of polylactic acid from structure to applications 聚乳酸从结构到应用前景

Polymers from Renewable Resources Pub Date : 2021-02-01 DOI: 10.1177/20412479211008773

K. Sreekumar, B. Bindhu, K. Veluraja

引用次数: 15

Vanillin based polymers: V. Poly(hydrovanilloin–urethane) 基于香兰素的聚合物：V.Poly（氢化香兰素-氨基甲酸酯）

Polymers from Renewable Resources Pub Date : 2021-02-01 DOI: 10.1177/2041247921989898

A. Amarasekara, Rocio Garcia-Obregon

{"title":"Vanillin based polymers: V. Poly(hydrovanilloin–urethane)","authors":"A. Amarasekara, Rocio Garcia-Obregon","doi":"10.1177/2041247921989898","DOIUrl":"https://doi.org/10.1177/2041247921989898","url":null,"abstract":"Renewable resources based hydrovanilloin [1,2-bis(4-hydroxy-3-methoxyphenyl)-1,2-ethanediol] was synthesized in 86% yield by electrochemical dimerization of vanillin in aqueous NaOH. This symmetrical bis-phenol monomer was then used for the preparation of urethane polymers by two different methods. In the first method a 1:2 mole ratio mixture of hydrovanilloin and diisocyanate was polymerized in DMF using 1,4-diazabicyclo[2,2,2]octane as the catalyst at 60°C, for 1 h to give poly(hydrovanilloin–urethane)s. In the second method diisocyanates were first reacted with polyethylene glycol-400 to give pre-polymers. Then prepolymers were reacted with equivalent amount of hydrovanilloin at 60°C for 4 days to produce poly(hydrovanilloin-ethylene glycol-urethane)s. The first method resulted hard poly(hydrovanilloin–urethane)s showing Tg values in the range of 121–172°C. The second method yielded softer poly(hydrovanilloin-ethylene glycol-urethane)s and these polymers failed to show distinct glass transition temperatures in the DSC analysis. However, poly(hydrovanilloin-ethylene glycol-urethane)s showed better thermal stabilities than polymers without polyethylene glycol units.","PeriodicalId":20353,"journal":{"name":"Polymers from Renewable Resources","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/2041247921989898","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49441681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Preparation physical, mechanical properties and biodegradable study of SAN/EOC/nanoclay/proteins nanocomposite SAN/EOC/纳米粘土/蛋白质纳米复合材料的制备、物理力学性能及生物可降解性研究

Polymers from Renewable Resources Pub Date : 2020-11-15 DOI: 10.1177/2041247920968505

N. Goudarzian, M. Esmaeli, S. Mousavi, S. Hashemi, M. Zarei, A. Gholami, K. Yousefi

{"title":"Preparation physical, mechanical properties and biodegradable study of SAN/EOC/nanoclay/proteins nanocomposite","authors":"N. Goudarzian, M. Esmaeli, S. Mousavi, S. Hashemi, M. Zarei, A. Gholami, K. Yousefi","doi":"10.1177/2041247920968505","DOIUrl":"https://doi.org/10.1177/2041247920968505","url":null,"abstract":"In this paper, the mechanical and morphological properties of biodegradable SAN/EOC/Nanoclay/Proteins nanocomposite were investigated. The composites were first prepared by a laboratory-scale twin screw extruder. Morphology of the blend was determined by SEM images. Mechanical properties in terms of tensile tests were carried out by Testometric TS2000, stress at break, strain at break, and Young’s modulus was determined. Based on mechanical results, although the young’s modulus increases with increasing protein content but the strain at break of the composite decreases acutely because of the presence of protein. The blend indicated an improvement in mechanical and thermal properties. Today, according to the vast application of plastic in different fields, environmental issues were affected by these kinds of non-degradable materials, so that biodegradability of the plastics is just the remaining route to solve. In this research, biodegradable blends were prepared using whey protein as a biodegradable natural polymer. The results of the biological procedure-test after 3 months indicated sufficient weight loss and biodegradation of these blends.","PeriodicalId":20353,"journal":{"name":"Polymers from Renewable Resources","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/2041247920968505","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43950996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Impact study of new formulations based on plasticized polyvinyl chloride (PVC) 增塑聚氯乙烯新配方的影响研究

Polymers from Renewable Resources Pub Date : 2020-11-02 DOI: 10.1177/2041247920968498

N. Lardjane, N. Belhaneche-Bensemra

引用次数: 0